geos::geom::prep::PreparedPolygonCovers Class Reference

Computes the covers spatial relationship predicate for a PreparedPolygon relative to all other Geometry classes. More...

#include <PreparedPolygonCovers.h>

Inheritance diagram for geos::geom::prep::PreparedPolygonCovers:

Public Member Functions
	PreparedPolygonCovers (const PreparedPolygon *const prep)
	Creates an instance of this operation.
bool	covers (const Geometry *geom)
	Tests whether this PreparedPolygon covers a given geometry.
Public Member Functions inherited from geos::geom::prep::AbstractPreparedPolygonContains
	AbstractPreparedPolygonContains (const PreparedPolygon *const p_prepPoly)
	AbstractPreparedPolygonContains (const PreparedPolygon *const p_prepPoly, bool p_requireSomePointInInterior)
Public Member Functions inherited from geos::geom::prep::PreparedPolygonPredicate
	PreparedPolygonPredicate (const PreparedPolygon *const p_prepPoly)
	Creates an instance of this operation.

Static Public Member Functions
static bool	covers (const PreparedPolygon *const prep, const geom::Geometry *geom)
	Computes the covers predicate between a PreparedPolygon and a Geometry.

Protected Member Functions
bool	fullTopologicalPredicate (const geom::Geometry *geom) override
Protected Member Functions inherited from geos::geom::prep::AbstractPreparedPolygonContains
bool	eval (const geom::Geometry *geom)
bool	evalPointTestGeom (const geom::Geometry *geom, geom::Location outermostLoc)
Protected Member Functions inherited from geos::geom::prep::PreparedPolygonPredicate
geom::Location	getOutermostTestComponentLocation (const geom::Geometry *testGeom) const
	Returns the outermost Location among a test point from each components of the test geometry.
bool	isAllTestComponentsInTargetInterior (const geom::Geometry *testGeom) const
	Tests whether all components of the test Geometry are contained in the interior of the target geometry.
bool	isAnyTestComponentInTarget (const geom::Geometry *testGeom) const
	Tests whether any component of the test Geometry intersects the area of the target geometry.
bool	isAnyTestComponentInTargetInterior (const geom::Geometry *testGeom) const
	Tests whether any component of the test Geometry intersects the interior of the target geometry.
bool	isAnyTargetComponentInAreaTest (const geom::Geometry *testGeom, const std::vector< const geom::CoordinateXY * > *targetRepPts) const

Additional Inherited Members
Protected Attributes inherited from geos::geom::prep::AbstractPreparedPolygonContains
bool	requireSomePointInInterior
Protected Attributes inherited from geos::geom::prep::PreparedPolygonPredicate
const PreparedPolygon *const	prepPoly

Detailed Description

Computes the covers spatial relationship predicate for a PreparedPolygon relative to all other Geometry classes.

Uses short-circuit tests and indexing to improve performance.

It is not possible to short-circuit in all cases, in particular in the case where the test geometry touches the polygon linework. In this case full topology must be computed.

Author

Martin Davis

Constructor & Destructor Documentation

PreparedPolygonCovers()

geos::geom::prep::PreparedPolygonCovers::PreparedPolygonCovers ( const PreparedPolygon *const  prep )

inline

Creates an instance of this operation.

Parameters

prep	the PreparedPolygon to evaluate

Member Function Documentation

covers() [1/2]

bool geos::geom::prep::PreparedPolygonCovers::covers ( const Geometry *  geom )

inline

Tests whether this PreparedPolygon covers a given geometry.

Parameters

geom	the test geometry

Returns

true if the test geometry is covered

References geos::geom::prep::AbstractPreparedPolygonContains::eval().

covers() [2/2]

static bool geos::geom::prep::PreparedPolygonCovers::covers ( const PreparedPolygon *const  prep, const geom::Geometry *  geom  )

inlinestatic

Computes the covers predicate between a PreparedPolygon and a Geometry.

Parameters

prep	the prepared polygon
geom	a test geometry

Returns

true if the polygon covers the geometry

References covers().

Referenced by covers().

fullTopologicalPredicate()

bool geos::geom::prep::PreparedPolygonCovers::fullTopologicalPredicate ( const geom::Geometry *  geom )

overrideprotectedvirtual

Computes the full topological covers predicate. Used when short-circuit tests are not conclusive.

Parameters

geom	the test geometry

Returns

true if this prepared polygon covers the test geometry

Implements geos::geom::prep::AbstractPreparedPolygonContains.

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The documentation for this class was generated from the following file:

• PreparedPolygonCovers.h